Senior VoIP Network Specialist

Placements24; Bloemfontein; Hybrid; ZAR 720,000 - 900,000; Full time

Benefits offered by this job

Medical benefits

Retirement benefits

Hybrid work model

Remote workdays

Job summary

Placements24 is seeking a Senior VoIP Network Specialist for our Bloemfontein operations. You will design, implement, and support VoIP infrastructure including IP-PBX, SBCs, and gateways, ensuring high-quality voice services for clients.

You will troubleshoot complex calling issues, optimize network performance, and mentor junior engineers. A strong background in SIP/RTP, IP networking, and UC technologies, with relevant certifications, is highly desirable.

Qualifications

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent experience.
• Minimum of 5 years of experience in designing, implementing, and supporting VoIP networks.
• In-depth knowledge of VoIP protocols such as SIP, H.323, RTP, and SRTP.
• Experience with major IP PBX platforms (e.g., Asterisk, Cisco Call Manager, Avaya) and SBCs (e.g., Oracle Acme Packet, Audiocodes).
• Strong understanding of IP networking concepts, including TCP/IP, QoS, and VLANs.
• Familiarity with unified communications platforms is a plus.
• Experience with call detail record (CDR) analysis and troubleshooting.
• Excellent problem-solving, analytical, and communication skills.
• Relevant certifications such as CCNP Voice, CCIE Collaboration, or SIP certifications are highly desirable.

Responsibilities

• Design, deploy, configure, and maintain VoIP infrastructure, including IP PBX systems, gateways, and session border controllers (SBCs).
• Monitor VoIP network performance, identify bottlenecks, and implement solutions for optimization.
• Troubleshoot and resolve complex VoIP call quality issues, signaling problems, and connectivity issues.
• Ensure the security of the VoIP network against unauthorized access and threats.
• Collaborate with core network and IT teams to ensure seamless integration of voice services.
• Develop and maintain comprehensive documentation of the VoIP network architecture, configurations, and procedures.
• Stay updated on the latest advancements in VoIP, unified communications, and related technologies.
• Manage vendor relationships and evaluate new VoIP equipment and software.
• Provide technical guidance and mentorship to junior members of the network team.
• Participate in capacity planning and infrastructure upgrade projects.

Skills

VoIP protocols

SIP

RTP/SRTP

IP networking

UC platforms

CDR analysis

Mentorship

Education

Bachelor's degree in CS/IT

Tools

Asterisk

Cisco Call Manager

Avaya

Oracle Acme Packet

Audiocodes

Job description

About the Role Our client, a progressive telecommunications company based in Bloemfontein, Free State , is seeking an experienced Senior VoIP Network Specialist . This role is central to the design, implementation, and ongoing support of our Voice over IP (VoIP) infrastructure, ensuring reliable and high-quality voice communications for our clients. The ideal candidate will have a deep understanding of VoIP protocols, network convergence, and unified communications technologies. This is an excellent opportunity to make a significant impact on our voice services offering in the Bloemfontein region. You will be responsible for maintaining system stability, troubleshooting complex issues, and architecting solutions that meet evolving business needs. We are looking for a technically adept individual with strong analytical skills and a passion for delivering seamless communication experiences. The position offers a challenging yet rewarding environment where your expertise in VoIP technologies will be highly valued and contribute directly to our operational excellence.

Key Responsibilities

• Design, deploy, configure, and maintain VoIP infrastructure, including IP PBX systems, gateways, and session border controllers (SBCs).
• Monitor VoIP network performance, identify bottlenecks, and implement solutions for optimization.
• Troubleshoot and resolve complex VoIP call quality issues, signaling problems, and connectivity issues.
• Ensure the security of the VoIP network against unauthorized access and threats.
• Collaborate with core network and IT teams to ensure seamless integration of voice services.
• Develop and maintain comprehensive documentation of the VoIP network architecture, configurations, and procedures.
• Stay updated on the latest advancements in VoIP, unified communications, and related technologies.
• Manage vendor relationships and evaluate new VoIP equipment and software.
• Provide technical guidance and mentorship to junior members of the network team.
• Participate in capacity planning and infrastructure upgrade projects.

Requirements

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent experience.
• Minimum of 5 years of experience in designing, implementing, and supporting VoIP networks.
• In-depth knowledge of VoIP protocols such as SIP, H.323, RTP, and SRTP.
• Experience with major IP PBX platforms (e.g., Asterisk, Cisco Call Manager, Avaya) and SBCs (e.g., Oracle Acme Packet, Audiocodes).
• Strong understanding of IP networking concepts, including TCP/IP, QoS, and VLANs.
• Familiarity with unified communications platforms is a plus.
• Experience with call detail record (CDR) analysis and troubleshooting.
• Excellent problem-solving, analytical, and communication skills.
• Relevant certifications such as CCNP Voice, CCIE Collaboration, or SIP certifications are highly desirable.

Benefits

Our client offers a competitive salary package, along with excellent medical and retirement benefits. Opportunities for professional growth and continuous learning are a key part of our employee development program. This hybrid role offers a flexible working arrangement, combining in-office collaboration in Bloemfontein, Free State with remote workdays. We foster a positive and collaborative work environment that values expertise and innovation. Join a dedicated team focused on delivering high-quality voice communication solutions.